Automobile heater



Dec. 21 @1926. 1,611,424 |T N ELY AUTOMOBILE HEATER Original Filed March2. 1925 Invanfnr.

\ (Ii/w. I J9 g flap/ Patented Dec. 21, 1926.

UNITED STATES IVAN N. ELY, or MINNEAPOLIS, MINNESOTA;

AUTOMOBILE HEATER.

Application filed March 2, 1925, Serial No. 12,788. Renewed October 22,1926.

My invention relates to automobile heaters of the manifold type in whichthe manifold and heater are cast integral.

My invention has as its object to provide a heater especially adapted todeliver a cur rent of .warm air immediately after the starting of theengine to which it is attached.

More particularly, it is my object toprovide a heater in which theordinary manifold is provided with an air tube extending through it fromone end'wall to the other and positioned to receive directly the'exhaustgases from the engine, and to be en tirely surrounded by such exhaustgases.

A further object is to provide means for conducting the air current tothe aforesaid air tube,.and conducting it fromsaid tube to the interiorof the automobile, said means also serving to provide an auxiliary airpassageon the exterior of the manifold in order to increase the capacityof the heater.

A further object is to provide a heater which is cast entirely in oneintegralcasting, and is at the same time of simple, durable andinexpensive construction.

With these and other objects in view, my invention cons'sts intheconstruction, an rangement and. combination of the various parts of mydevice, whereby the objects contemplated are attained, as hereinaftermore fully set forth, pointed out in my'claim, and illustrated in theaccompanying drawings,'in which:

Fig. 1 is an elevation of an engine to which my heater is attached, aportion of the floor boards of the automobile being shown in section.

Fig. 2 is a vertical transverse section through the heater, taken on the line 22 of Fig. 3. v

Fig. 3 is a vertical longitudinal sectional view through the heater,taken on the line a 3 of Fig. 2.

Fig. 4 is a plan View of the heater, partly in section, taken on theline 4 4 of Fig. 3.

Fig. 5 is a side elevation of the heater.

I have used the reference character 10 to indicate generally an engineof. a common type of automobile, which has the intake manifold, 11 ,and'the exhaust ipe, 12. The, dash of the automobile is in icated at 13, andthe foot boards at 14. The ordinary exhaust manifold comprises alongitudinal tube member, 15, having the four elbows, 16. which serve toconnect the manifold with the exhaust ports of the engine. The rear end.of the manifold tube, 15, is bent rear- Wardly and downward as at 16,and threaded at 17 to receive the packing nut, 18, conmeeting themanifold with the exhaust pipe, 12. 4 v p In order to remedy theobjections of the heaters now in use, the integral heater cast in onepiece with the manifold has been provided, which has the advantage ofserving to heat the air on all sides instead of on one. That is, theheat from the manifold is conducted almost instantly by conductionthroughout the metal walls of the air duct, and the current of air'isthus surrounded on all sides by heated metal walls and absorbs more heatin passing.

Another objection which may behad against the heater which attachesaround the old manifold is that the currents of air tend to absorbdisagreeable odors from the surface of the manifold and engine block.caused by accumulations of oily material thereon. The integralconstruction does away with these objections.

My invention is aimed, primarily, to improving the integral type heaterby employing an air tube whichis situated within the manifold itselfandexposed directly to; the exhaust gases on all sides thereof. There I arecertain problems in'construction of a manifold embodying such a heatiwhich my invention solves.

The size which may be given to the inner heating tube is limited sinceit is desirable ng tube to maintain the general proportions of themanifold about the same, andat the same time not obstruct the flow ofthe gases on the interior thereof.

I have used the reference character, 19, to indicate the inner air tube,which is of seamless steel tubing, having its ends cast ifnig the endwalls, 20 and 21, of the mani In casting the manifold the sand core usedto form the hollow interior thereof is-baked around the steel tube, 19.The ends of the, tube, 19,'are allowed to project beyond the core awalls, 20 and 21, so that whenthe manifold is cast around the core, thetube will become united integrally with the manifold casting. Uponremoval of the sand of the core, the interior of the manifold will havethe construction shown in Fig. 3.

The manifold is enlarged somewhat in width to preserve practically thesame pproximately the thickness of the cross-sectional area between itsWalls and the tube, 19, as formerly was had in the old type manifold.

In order to provide sufficient circulation of air, the auxiliary airduct, 22, is formed on the outer side of the manifold. The air duct, 22,follows the general contour of the tubular portion, 15, of the manifold,but does not cover the elbows, 16. This is illustrated in Fig. 5.

The current of air passing through the inner air tube, 19, will,especially during the first fifteen minutes or so of the running of theengine, deliver a much hotter current of air than the outer air duct,22, and as a result it is desirable that the air from the air duct, 22,be mixed thoroughly-with the heated air from the tube, 19, before-it isdischarged into the interior of the car. The air duct, 22, is thereforecontinued around the rear end wall, 20, of the manifold, as at 23, andthence continued along the plane of the manifold proper, as at 24-.

The portion, 2%, which may be called the neck of the heater, is alignedwith the tube, 19, as illustrated in Fig. 41, and the air current fromthe duct, 22, will thus first strike the air current from the tube, 19,in a transverse direction so as to tend to break up the current from'thetube, 19, and will then tend to completely envelop what remains thereofso as to most completely mix therewith.

A simple butterfly valve, 25, may be provided in the discharge end ofthe neck, 24, to regulate the flow of air therefrom. At the forward endof the manifold the air duct, 22, is spread around the end of themanifold to form a somewhat ball-shaped receiving cup, 26, to receivethe current of air from the fan of the car.

It will now be seen that the tube, 19,will receive the direct heat fromthe exhaust when the engine is started and will almost immediatelycommence to discharge a warm stream of air into the neck, 24-.Sullicient heat will be given off thereby to warm the current of airpassing through the duct, 22, so that the heater will not discharge acurrent of cold air into the car when the car is started. After theengine has operated for some time the manifold will become heated to ahigh degree of temperature, and the walls of the duct, 22, will becomeheated in the same way by conduction. The current of air passingtherethrough will therefore be considerably hotter than that produced inthe ordinary attachable type heater.

and it is my intention to cover by my claim any modified forms ofstructure or use of mechanical equivalents which may be reasonablyincluded within its scope.

I claim asmy invention:

In a (ombined exhaust manifold and vehicle heater, a manifold proper inthe form of an elongated tube having a rear downwardly bent exhaust pipeand a rear wall forming part thereof, and having a front wall; alongitudinal air duct formed on the side of the manifold and integraltherewith, said air duct extending around the rear wall of the manifoldand having a dis charge neck extending rearwardly from the manifold andhaving its axis disposed substantially in the same vertical plane withthe vertical axis of the manifold, said air duct having an intake bellat its forward end extending substantially across the end of themanifold, and an interior air tube having its ends unitedwith theforward and rear walls of the manifold, spaced from the sides of themanifold and extending longitudinally thereof, said tube communicatingat its ends with the bell and the disi'harge neck, respectively, of theair duct, being positioned to receive directly against the outer surfacethe exhaust gases passing through the manifold, and the discharge mouthof said air tube being positioned centrally of said discharge neck.

Signed at Remsen, in the county of Plymouth and State of Iowa, this 3rdday of February, 1925-.

IVAN N. ELY.

